Question

in order to apply the law of cosines to find the measure of an interior angle, it is enough to know which of the following?

Answer 1

it is enough to know all of the measures of the sides so its a
This is due to the formula involving three sides and one angle

Answer 2

a. the lengths of all three sides of a triangle

Explanation:

To find the measure of an interior angle, you need to know three sides of the triangle.

Let me explain with the cosine formula.

c^2 = a^2 + b^2 -2ab cos C

Here a, b, c are the sides of the triangle and C is an interior angle.

Form the above formula, we can find C.

cos C = (a^2 + b^2 - c^2)/2ab

Therefore, we need three sides to find an interior angle using the cosine formula.

Hope this will helpful.

Thank you.